VDM,
Based on your description, it sounds like it's operating normally. Unfortunately, it is rather slow and "All Classes" is, of course, the most intensive. I just ran "All Classes" on the stopwatch, 35 seconds to load all 340 classes on my computer (Firefox & Safari on Mac). I haven't figured out if that's a hosting issue or a plugin issue, but it is annoying.
Do me a favor and check out
this test page. I've isolated the classes by month, so there aren't as many to load. Let me know if that works better for you.
Thanks for the feedback.
Cheers,
David S.